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1. Impact of a custom-made 3D printed ergonomic grip for direct laryngoscopy on novice intubation performance in a simulated easy and difficult airway scenario-A manikin study.

Author

Sung-Hoon Kim, Jeonghoon Kwon, Youn-Jung Kim, Hyung-Joo Lee, Hyo-Chang Seo, Seung Bok Lim, Segyeong Joo, Dong-Woo Seo, Won-Young Kim, and Sang-Bum Hong

Subjects
Medicine, Science
Abstract

Direct laryngoscopy using a Macintosh laryngoscope is the most widely used approach; however, this skill is not easy for novices and trainees. We evaluated the performance of novices using a laryngoscope with a three-dimensional (3D)-printed ergonomic grip on an airway manikin. Forty second-year medical students were enrolled. Endotracheal intubation was attempted using a conventional Macintosh laryngoscope with or without a 3D-printed ergonomic support grip. Primary outcomes were intubation time and overall success rate. Secondary outcomes were number of unsuccessful attempts, first-attempt success rate, airway Cormack-Lehane (CL) grade, and difficulty score. In the easy airway scenario, intubation time, and the overall success rate were similar between two group. CL grade and ease-of-use scores were significantly better for those using the ergonomic support grip (P < 0.05). In the difficult airway scenario, intubation time (49.7±37.5 vs. 35.5±29.2, P = 0.013), the first-attempt success rate (67.5% vs. 90%, P = 0.029), number of attempts (1.4±0.6 vs. 1.1±0.4, P = 0.006), CL grade (2 [2, 2] vs. 2 [1, 1], P = 0.012), and ease-of-use scores (3.5 [2, 4] vs. 4 [3, 5], P = 0.008) were significantly better for those using the ergonomic support grip. Linear mixed model analysis showed that the ergonomic support grip had a favorable effect on CL grade (P

Published
2018
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2. Impact of a custom-made 3D printed ergonomic grip for direct laryngoscopy on novice intubation performance in a simulated easy and difficult airway scenario—A manikin study

Author

Hyo-Chang Seo, Youn-Jung Kim, Jeonghoon Kwon, Sang-Bum Hong, Sung-Hoon Kim, Segyeong Joo, Won Young Kim, Dong-Woo Seo, Hyung-Joo Lee, and Seung Bok Lim

Subjects
Male, Students, Medical, Medical Doctors, Health Care Providers, medicine.medical_treatment, Respiratory System, lcsh:Medicine, Electronics engineering, Social Sciences, Endotracheal intubation, Manikins, Learning and Memory, 0302 clinical medicine, 030202 anesthesiology, Medicine and Health Sciences, Psychology, Intubation, Medical Personnel, lcsh:Science, Multidisciplinary, Covariance, Hand Strength, medicine.diagnostic_test, Human factors and ergonomics, 3D printing, Hematology, Professions, Physical Sciences, Printing, Three-Dimensional, Engineering and Technology, Educational Status, Female, Research Article, 3d printed, medicine.medical_specialty, Laryngoscopy, Surgical and Invasive Medical Procedures, Laryngoscopes, Human Learning, 03 medical and health sciences, Physicians, Intubation, Intratracheal, medicine, Learning, Humans, Difficult airway, business.industry, lcsh:R, Hemodynamics, Cognitive Psychology, Biology and Life Sciences, Random Variables, 030208 emergency & critical care medicine, Probability Theory, Trainees, Health Care, Human Factors Engineering, People and Places, Physical therapy, Cognitive Science, lcsh:Q, Population Groupings, Ergonomics, Airway, business, Mathematics, Neuroscience
Abstract

Direct laryngoscopy using a Macintosh laryngoscope is the most widely used approach; however, this skill is not easy for novices and trainees. We evaluated the performance of novices using a laryngoscope with a three-dimensional (3D)-printed ergonomic grip on an airway manikin. Forty second-year medical students were enrolled. Endotracheal intubation was attempted using a conventional Macintosh laryngoscope with or without a 3D-printed ergonomic support grip. Primary outcomes were intubation time and overall success rate. Secondary outcomes were number of unsuccessful attempts, first-attempt success rate, airway Cormack-Lehane (CL) grade, and difficulty score. In the easy airway scenario, intubation time, and the overall success rate were similar between two group. CL grade and ease-of-use scores were significantly better for those using the ergonomic support grip (P < 0.05). In the difficult airway scenario, intubation time (49.7±37.5 vs. 35.5±29.2, P = 0.013), the first-attempt success rate (67.5% vs. 90%, P = 0.029), number of attempts (1.4±0.6 vs. 1.1±0.4, P = 0.006), CL grade (2 [2, 2] vs. 2 [1, 1], P = 0.012), and ease-of-use scores (3.5 [2, 4] vs. 4 [3, 5], P = 0.008) were significantly better for those using the ergonomic support grip. Linear mixed model analysis showed that the ergonomic support grip had a favorable effect on CL grade (P

Published
2018

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